/** * To change this template, choose Tools | Templates * and open the template in the editor. */ package net.individuals.web.servlet;
import java.io.DataInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/** * * @author Barudisshu */ @WebServlet(name = "UploadServlet", urlPatterns = {
"/UploadServlet"}
) public class UploadServlet extends HttpServlet {
/** * Processes requests for both HTTP * <code>GET</code> and * <code>POST</code> methods. * * @param request servlet request * @param response servlet response * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;
charset=UTF-8");
//读取请求Body byte[] body = readBody(request);
//取得所有Body内容的字符串表示 String textBody = new String(body, "ISO-8859-1");
//取得上传的文件名称 String fileName = getFileName(textBody);
//取得文件开始与结束位置 Position p = getFilePosition(request, textBody);
//输出至文件 writeTo(fileName, body, p);
}
//构造类 class Position {
int begin;
int end;
public Position(int begin, int end) {
this.begin = begin;
this.end = end;
}
}
private byte[] readBody(HttpServletRequest request) throws IOException {
//获取请求文本字节长度 int formDataLength = request.getContentLength();
//取得ServletInputStream输入流对象 DataInputStream dataStream = new DataInputStream(request.getInputStream());
byte body[] = new byte[formDataLength];
int totalBytes = 0;
while (totalBytes < formDataLength) {
int bytes = dataStream.read(body, totalBytes, formDataLength);
totalBytes += bytes;
}
return body;
}
private Position getFilePosition(HttpServletRequest request, String textBody) throws IOException {
//取得文件区段边界信息 String contentType = request.getContentType();
String boundaryText = contentType.substring(contentType.lastIndexOf("=") + 1, contentType.length());
//取得实际上传文件的气势与结束位置 int pos = textBody.indexOf("filename="");
pos = textBody.indexOf("n", pos) + 1;
pos = textBody.indexOf("n", pos) + 1;
pos = textBody.indexOf("n", pos) + 1;
int boundaryLoc = textBody.indexOf(boundaryText, pos) - 4;
int begin = ((textBody.substring(0, pos)).getBytes("ISO-8859-1")).length;
int end = ((textBody.substring(0, boundaryLoc)).getBytes("ISO-8859-1")).length;
return new Position(begin, end);
}
private String getFileName(String requestBody) {
String fileName = requestBody.substring(requestBody.indexOf("filename="") + 10);
fileName = fileName.substring(0, fileName.indexOf("n"));
fileName = fileName.substring(fileName.indexOf("n") + 1, fileName.indexOf("""));
return fileName;
}
private void writeTo(String fileName, byte[] body, Position p) throws IOException {
FileOutputStream fileOutputStream = new FileOutputStream("e:/workspace/" + fileName);
fileOutputStream.write(body, p.begin, (p.end - p.begin));
fileOutputStream.flush();
fileOutputStream.close();
}
// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code."> /** * Handles the HTTP * <code>GET</code> method. * * @param request servlet request * @param response servlet response * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
processRequest(request, response);
}
/** * Handles the HTTP * <code>POST</code> method. * * @param request servlet request * @param response servlet response * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
processRequest(request, response);
}
/** * Returns a short description of the servlet. * * @return a String containing servlet description */ @Override public String getServletInfo() {
return "Short description";
}
// </editor-fold> }

POST http://www.example.com HTTP/1.1 Content-Type:multipart/form-data;
boundary=----WebKitFormBoundaryrGKCBY7qhFd3TrwA ------WebKitFormBoundaryrGKCBY7qhFd3TrwA Content-Disposition: form-data;
name="text" title ------WebKitFormBoundaryrGKCBY7qhFd3TrwA Content-Disposition: form-data;
name="file";
filename="chrome.png" Content-Type: image/png PNG ... content of chrome.png ... ------WebKitFormBoundaryrGKCBY7qhFd3TrwA-- [html] view plain copy/** * To change this template, choose Tools | Templates * and open the template in the editor. */ package net.individuals.web.servlet;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.servlet.ServletException;
import javax.servlet.annotation.MultipartConfig;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.Part;
/** * * @author Barudisshu */ @MultipartConfig @WebServlet(name = "UploadServlet", urlPatterns = {
"/UploadServlet"}
) public class UploadServlet extends HttpServlet {
/** * Processes requests for both HTTP * <code>GET</code> and * <code>POST</code> methods. * * @param request servlet request * @param response servlet response * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
Part part = request.getPart("photo");
String fileName = getFileName(part);
writeTo(fileName, part);
}
//取得上传文件名 private String getFileName(Part part) {
String header = part.getHeader("Content-Disposition");
String fileName = header.substring(header.indexOf("filename="") + 10, header.lastIndexOf("""));
return fileName;
}
//存储文件 private void writeTo(String fileName, Part part) throws IOException, FileNotFoundException {
InputStream in = part.getInputStream();
OutputStream out = new FileOutputStream("e:/workspace/" + fileName);
byte[] buffer = new byte[1024];
int length = -1;
while ((length = in.read(buffer)) != -1) {
out.write(buffer, 0, length);
}
in.close();
out.close();
}
// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code."> /** * Handles the HTTP * <code>GET</code> method. * * @param request servlet request * @param response servlet response * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
processRequest(request, response);
}
/** * Handles the HTTP * <code>POST</code> method. * * @param request servlet request * @param response servlet response * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
processRequest(request, response);
}
/** * Returns a short description of the servlet. * * @return a String containing servlet description */ @Override public String getServletInfo() {
return "Short description";
}
}

/** * To change this template, choose Tools | Templates * and open the template in the editor. */ package net.individuals.web.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.MultipartConfig;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.Part;
/** *采用part的wirte(String fileName)上传，浏览器将产生临时TMP文件。 * @author Barudisshu */ @MultipartConfig(location = "e:/workspace") @WebServlet(name = "UploadServlet", urlPatterns = {
"/UploadServlet"}
) public class UploadServlet extends HttpServlet {
/** * Processes requests for both HTTP * <code>GET</code> and * <code>POST</code> methods. * * @param request servlet request * @param response servlet response * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//处理中文文件名 request.setCharacterEncoding("UTF-8");
Part part = request.getPart("photo");
String fileName = getFileName(part);
//将文件写入location指定的目录 part.write(fileName);
}
private String getFileName(Part part) {
String header = part.getHeader("Content-Disposition");
String fileName = header.substring(header.indexOf("filename="") + 10, header.lastIndexOf("""));
return fileName;
}
// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code."> /** * Handles the HTTP * <code>GET</code> method. * * @param request servlet request * @param response servlet response * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
processRequest(request, response);
}
/** * Handles the HTTP * <code>POST</code> method. * * @param request servlet request * @param response servlet response * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
processRequest(request, response);
}
/** * Returns a short description of the servlet. * * @return a String containing servlet description */ @Override public String getServletInfo() {
return "Short description";
}
// </editor-fold> }